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Brief about female heterogamety.

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प्रश्न

Brief about female heterogamety.

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उत्तर

Female heterogamety (ZO females) refers to the condition, where female produces two types of egg cells. Some with Z chromosome and some without Z chromosome.

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Principles of Inheritance and Variation - Evaluation [पृष्ठ ५६]

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सामाचीर कलवी Biology (Zoology) [English] Class 12 TN Board
अध्याय 4 Principles of Inheritance and Variation
Evaluation | Q 33. | पृष्ठ ५६
सामाचीर कलवी Biology (Zoology) [English] Class 12 TN Board
अध्याय 4 Principles of Inheritance and Variation
Evaluation | Q 37. | पृष्ठ ५९

संबंधित प्रश्न

Which combination of genes in the zygote will produce children with blue eyes?


Name two animals which have nineteen pairs of chromosomes. 


A family consists of two parents and their five children and the pedigree chart below shows the inheritance of the trait colour blindness in them.  

Who is colour blind in the parents – the Father or the Mother?  


Kavitha gave birth to a female baby. Her family members say that she can give birth to only female babies because of her family history. Is the statement given by her family members true? Justify your answer.


ZW-ZZ system of sex determination occurs in


Haplodiploidy is found in ______.


A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.


Sex of an individual is determined by different factors in various species. Some animals rely entirely on the environmental ones, while in some other animals the individuals can change their sex during their life time indicating that sex of some species is not genetically determined. However in human beings, the sex of an individual is largely determined genetically.

  1. In what way are the sex chromosomes 'X' and 'Y' different in size? Name the mismatched pair of sex chromosome in humans.
  2. Write the number of pair/pairs of sex chromosomes present in human beings. In which one of the parent (male/female) perfect pair/pairs of sex chromosome are present?
  3. Citing two examples, justify the statement "Sex of an individual is not always determined genetically".

OR

Draw a flow chart to show that sex is determined genetically in human beings. 


What is sex determination? Explain the mechanism of sex determination in the case of birds.


How does the haplodiploidy system differ from the XX–XY, XX–XO, and ZW–ZZ systems in determining sex?


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